BURLINGTON — A grandmother charged with giving a fatal drug overdose to her infant grandson has been found mentally incompetent to stand trial.

The Burlington Free Press says this week’s court decision means 55-year-old Pamela Raymond of Morristown, who was charged two years ago with second-degree murder, could be released for psychiatric treatment.

Raymond, a former nurse, has been in custody since October 2011, a year after the death of her 3-month-old grandson, Warren Bailey. The child was given a lethal dose of an antidepressant to keep him quiet so he would not bother Raymond’s husband in September 2010.